Flexible support beam suitable for advance support mechanism

Abstract

The utility model relates to the technical field of supporting, in particular to a flexible supporting beam suitable for an advance supporting mechanism, and solves the problems that in the prior art, the stability of a flexible supporting beam is insufficient, an additional limiting and fixing mechanism is lacked, bolts are mostly adopted for fixing each supporting beam, and the supporting beam is inconvenient to fix. Therefore, the use convenience and the stability of the support beam are greatly reduced. A flexible supporting beam suitable for an advance supporting mechanism comprises a first beam body, one side of the first beam body is rotationally connected with a second beam body through a pin shaft, and the two sides of the first beam body and the two sides of the second beam body are fixedly connected with side plates. According to the mode provided by the utility model, the first beam body and the second beam body can be limited after being in place through the continuous contraction of the fixing belt between the first beam body and the second beam body, so that the overall stability of the supporting beam is improved, and meanwhile, the flexible supporting beam consisting of a plurality of first beam bodies and second beam bodies can be conveniently mounted; and high convenience is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of support, in particular to a flexible support beam suitable for an advanced support mechanism. Background Art

[0002] Advance support is an auxiliary measure taken before the excavation of the tunnel face to ensure the stability of the working face during tunnel excavation. Advance support refers to the use of a series of technical means to pre-support the rock and soil ahead of the tunnel excavation to prevent it from falling or collapsing during the excavation process. The main purpose of this measure is to ensure the stability of the tunnel excavation working face, reduce surrounding rock deformation, and control surface subsidence, thereby ensuring construction safety. There are various methods of advance support, and different support methods can be selected according to geological conditions and project requirements. Pipe-roof support is to drive steel pipes into the stratum through holes drilled outside the excavation contour and combine them with steel arches to form a powerful scaffolding pre-support reinforcement system. This method is suitable for strata where the tunnel face cannot stabilize itself and contain water. It is effective in controlling surface subsidence and preventing seepage and water. Advance anchor rods or advance small conduit support is to drive anchor rods or small conduits obliquely in front of the working face before excavation and perform grouting reinforcement. This method is suitable for shallowly buried, loose, and fractured strata, significantly improving the self-bearing capacity of the surrounding rock. Horizontal jet grouting pile support uses jet grouting to form a continuous pile body within the stratum, thereby reinforcing the stratum ahead of the excavation face. This method is applicable to a variety of geological conditions, particularly weak and fractured strata. It is suitable for shallowly buried, tunnel entrances, and certain biased areas. Surface mortar bolting or grouting reinforcement improves stratum stability. Advanced deep-hole pre-grouting of the surrounding rock is often used for reinforcement in extremely loose, fractured, and weak strata, or in weak areas with significant water inflow, as well as in fault fracture zones. Advanced support plays a vital role in tunneling projects, effectively limiting ground subsidence and settlement of the strata above the tunnel, maintaining a stable natural stratum during tunnel excavation. Research has shown that advanced support can inhibit ground subsidence by 30%-35% and settlement of the strata above the tunnel by 40%. In addition, advanced support can reduce surrounding rock deformation, improve the self-stabilizing ability of the stratum, and provide strong guarantees for the subsequent construction of the tunnel.

[0003] Flexible support beams for advanced support are a type of support structure widely used in engineering fields such as tunneling and mining. They are designed to improve the stability and safety of working faces. These beams combine a rigid beam with flexible support components. These beams not only provide sufficient support but also adapt to deformation of the surrounding rock, thereby maintaining the stability and safety of the support structure. The characteristic of flexible support beams is their ability to closely adhere to the surrounding rock or penetrate deep into the rock mass, effectively leveraging the rock's self-supporting capacity and allowing some deformation without damage. Flexible support beams for advanced support typically consist of a rigid beam and flexible support components. The rigid beam features a hollow structure with high strength and rigidity, and is used to bear the primary support forces. The flexible support components include hydraulic cylinders, chains, support sprockets, guide sprockets, chain tensioning springs, support rubber blocks, and chain stoppers. These components work together to enable the support beam to adapt to surrounding rock deformation and maintain the stability of the support structure. When the flexible support beam is installed on the working surface, the rigid beam provides the primary support force, while the flexible support assembly adjusts according to surrounding rock deformation. The hydraulic cylinder adjusts the support force as needed, while the chain and support sprockets adapt to surrounding rock deformation, ensuring a tight fit between the support beam and the surrounding rock. The chain tensioning spring and support rubber blocks act as buffers, reducing the impact of surrounding rock deformation on the support beam.

[0004] When using support beams, it is necessary to ensure the stability of the support beams and the convenience of use. However, considering that the traditional flexible support beams are not stable enough and lack additional limiting and fixing mechanisms, bolts are often used when fixing each support beam, which greatly reduces the convenience and stability of the support beams and is extremely inconvenient. Therefore, there is an urgent need for a flexible support beam suitable for an advanced support mechanism to solve the above problems. Utility Model Content

[0005] The purpose of this utility model is to provide a flexible support beam suitable for an advance support mechanism, which solves the problem that the flexible support beams in the prior art are insufficiently stable and lack additional limiting and fixing mechanisms. When fixing each support beam, bolts are mostly used, which greatly reduces the ease of use and stability of the support beam.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A flexible support beam suitable for an advance support mechanism includes a first beam body, one side of the first beam body is rotatably connected to the second beam body via a pin shaft, and both sides of the first beam body and both sides of the second beam body are fixedly connected to side plates, and one side of the four side plates is fixedly connected to a connecting rod, wherein a fixing belt is wrapped around and connected between the two side plates on the same side, one side of the two fixing belts is provided with a threaded rod, and one end of the threaded rod passes through the top and bottom of the fixing belt in sequence, and the top and bottom ends of the threaded rod are screwed together with a threaded sleeve.

[0008] Preferably, one side of the first beam body is fixedly connected to a connecting frame, and the inner side of the connecting frame is rotatably connected to a fixing rod, one side of the second beam body is fixedly connected to a fixing plate, and both sides of the fixing plate are fixedly connected to a limiting frame, and both limiting frames are screwed together with fixing screws.

[0009] Preferably, both ends of the fixing rod pass through the side walls of the connecting frame in sequence through the bearing sleeves.

[0010] Preferably, the bottom of the first beam body and the bottom of the second beam body are both fixedly connected with a plurality of insertion rods.

[0011] Preferably, an annular groove is sleeved on one end of each of the four connecting rods, and the two ends of the fixing belt are respectively located on the inner sides of the two annular grooves.

[0012] Preferably, one end of each of the two fixing screws passes through the top and bottom of the limiting frame in sequence through the thread groove.

[0013] The utility model has the following beneficial effects:

[0014] First, according to the required support curvature, the rotation connection between the first beam and the second beam can be used to make the first beam and the second beam fit the support position. By using the threaded rod on the fixing belt, the two threaded sleeves are continuously approached to shrink the fixing belt, and the fixing belt limits the first beam and the second beam. Finally, a limiting frame can be put on the fixing rod, and then the limiting frame is closed by the fixing screw, so that the support beam composed of multiple first beams and second beams can be connected and fixed. Compared with the flexible support beams in the prior art, which are not stable enough and lack additional limiting and fixing mechanisms, bolts are often used to fix each support beam, which greatly reduces the convenience and stability of the support beam. The method proposed in the utility model can limit the position of the first beam and the second beam after they are in place by continuously shrinking the fixing belt between the first beam and the second beam, thereby improving the overall stability of the support beam and facilitating the installation of the flexible support beam composed of multiple first beams and the second beam, which is very convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 This is a schematic diagram of the overall main structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the bottom structure of the utility model;

[0018] Figure 3 This is a schematic diagram of the fixed plate structure of the utility model;

[0019] Figure 4 This is a side view of the structure of the utility model;

[0020] Figure 5 This is a schematic diagram of the fixing belt structure of the utility model.

[0021] In the figure: 1. First beam; 2. Second beam; 3. Side plate; 4. Connecting rod; 5. Fixing belt; 6. Threaded rod; 7. Threaded sleeve; 8. Connecting frame; 9. Fixing rod; 10. Fixing plate; 11. Limiting frame; 12. Fixing screw; 13. Insert rod; 14. Annular groove. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0023] Reference Figure 1-5 , a flexible support beam suitable for an advance support mechanism, comprising a first beam body 1, one side of the first beam body 1 is rotatably connected to the second beam body 2 by a pin shaft, and both sides of the first beam body 1 and both sides of the second beam body 2 are fixedly connected with side plates 3, and one side of the four side plates 3 is fixedly connected with a connecting rod 4, and the connecting rod 4 and its components can be used to support the fixing belt 5, wherein the two side plates 3 on the same side are wrapped and connected with a fixing belt 5, one side of the two fixing belts 5 is provided with a threaded rod 6, and one end of the threaded rod 6 passes through the top and bottom of the fixing belt 5 in turn, and the top and bottom ends of the threaded rod 6 are screwed together with a threaded sleeve 7 by threading, and the fixing belt 5 can be continuously contracted by continuously rotating the threaded sleeve 7.

[0024] Furthermore, one side of the first beam body 1 is fixedly connected to a connecting frame 8, and the inner side of the connecting frame 8 is rotatably connected to a fixing rod 9, one side of the second beam body 2 is fixedly connected to a fixing plate 10, and both sides of the fixing plate 10 are fixedly connected to a limiting frame 11, and both limiting frames 11 are screwed together with a fixing screw 12. By using the limiting frame 11 and the fixing rod 9 for socketing, multiple support beams can be connected, and the flexible rotation of the support beam can also be adjusted.

[0025] Furthermore, both ends of the fixing rod 9 pass through the side walls of the connecting frame 8 in sequence through the bearing sleeves.

[0026] Furthermore, a plurality of insert rods 13 are fixedly connected to the bottom of the first beam body 1 and the bottom of the second beam body 2 . The insert rods 13 can further improve the stability of the first beam body 1 and the second beam body 2 .

[0027] Furthermore, an annular groove 14 is provided on one end of each of the four connecting rods 4, and both ends of the fixing belt 5 are respectively located inside the two annular grooves 14. The annular grooves 14 are used to improve the stability of the fixing belt 5 and prevent the fixing belt 5 from falling off.

[0028] Furthermore, one end of each of the two fixing screws 12 passes through the top and bottom of the limiting frame 11 in sequence through the thread groove.

[0029] In summary:

[0030] In actual application, it has demonstrated a high degree of flexibility and adaptability. The essence of the design of this support beam is that it can accurately adapt to various complex terrains and support requirements to ensure the efficiency and safety of support operations. In specific use, it is first necessary to flexibly adjust the relative angle between the first beam body 1 and the second beam body 2 according to the curvature requirements of the actual support area. This adjustment process is due to the carefully designed rotating connection mechanism between the two, which allows the support beam to have sufficient flexibility while maintaining structural strength. It can fit closely to the contour of the support position, and can achieve perfect adaptation to both straight and curved segments. This design not only improves the accuracy of support, but also effectively reduces the safety hazards caused by poor support. After the first beam body 1 and the second beam body 2 are precisely adjusted to the predetermined position and fixed, the next step is to use the threaded rod 6 on the fixing belt 5 for further tightening and fine-tuning. In this step, by rotating the threaded sleeve 7, the two threaded sleeves 7 can be driven to move toward each other along the threaded rod 6, gradually tightening. The tightening of the fixed belt 5 and the fixing belt 5 not only enhances the overall stability of the support beam, but also enables the support beam to fit closely to the support surface, thereby improving the support effect. In addition, in order to further enhance the integrity and continuity of the support system, by sleeve-mounting the limit frame on the fixing rod of the adjacent support beam and using the fixing screw to close and lock the limit frame, the support beam unit consisting of multiple first beam bodies 1 and second beam bodies 2 can be firmly connected together to form a continuous and stable support system. This connection method not only simplifies the on-site installation process and reduces the installation time, but also significantly improves the overall bearing capacity and anti-deformation ability of the support structure, providing a strong guarantee for the stability and safety of underground projects. By sleeve-mounting the limit frame 11 and the fixing rod 9, multiple support beams can be connected, and the flexible rotation adjustment of the support beam can be performed. The annular groove 14 is used to improve the stability of the fixing belt 5 to prevent the fixing belt 5 from falling off, and the insertion rod 13 can be used to further improve the stability of the first beam body 1 and the second beam body 2.

[0031] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions merely illustrate the principles of the present invention. Various changes and improvements are possible without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed for the present invention is defined by the appended claims and their equivalents.

Claims

1. A flexible support beam suitable for an advance support mechanism, comprising a first beam body (1), characterized in that: One side of the first beam body (1) is rotatably connected to the second beam body (2) via a pin shaft, and both sides of the first beam body (1) and both sides of the second beam body (2) are fixedly connected to side panels (3), and one side of the four side panels (3) is fixedly connected to a connecting rod (4), wherein a fixing belt (5) is wound and connected between two side panels (3) on the same side, and one side of the two fixing belts (5) is provided with a threaded rod (6), and one end of the threaded rod (6) passes through the top and bottom of the fixing belt (5) in sequence, and the top and bottom ends of the threaded rod (6) are screwed together with a threaded sleeve (7).

2. A flexible support beam suitable for an advanced support mechanism according to claim 1, characterized in that: One side of the first beam body (1) is fixedly connected to a connecting frame (8), and the inner side of the connecting frame (8) is rotatably connected to a fixing rod (9); one side of the second beam body (2) is fixedly connected to a fixing plate (10), and both sides of the fixing plate (10) are fixedly connected to limiting frames (11), and both limiting frames (11) are screwed together with fixing screws (12).

3. The flexible support beam suitable for an advanced support mechanism according to claim 2, characterized in that: Both ends of the fixing rod (9) pass through the side walls of the connecting frame (8) in sequence through the bearing sleeves.

4. The flexible support beam suitable for an advanced support mechanism according to claim 1, characterized in that: The bottom of the first beam body (1) and the bottom of the second beam body (2) are both fixedly connected with a plurality of insertion rods (13).

5. The flexible support beam suitable for an advanced support mechanism according to claim 1, characterized in that: An annular groove (14) is sleeved on one end of each of the four connecting rods (4), and both ends of the fixing belt (5) are respectively located inside the two annular grooves (14).

6. The flexible support beam suitable for an advanced support mechanism according to claim 2, characterized in that: One end of each of the two fixing screws (12) passes through the top and bottom of the limiting frame (11) in sequence through the thread groove.

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